This article is intended to give engineers a brief overview of the SAE J1939 protocol and how J1939 networks operate. For additional information, including source code, CPU benchmarks, and a presentation on J1939, visit the J1939 Software webpage.
Controller Area Network (CAN) is the most widely-used automotive bus
architecture. Here are some reasons why.
Some modern automobiles contain three
miles of cabling. Because this number is liable to rise as components
grow more intelligent, we'll need to find ways to reduce the amount of
wiring. The sheer weight of the wiring is motivation enough for
automobile manufacturers to reduce the size of the wiring loom.
Distributed systems require protocols for communication between microcontrollers. Controller Area Networks (CAN) and Serial Peripheral Interfaces (SPI) are two of the most common such protocols.
New standards are making the delivery of Web-based and
enhanced content alongside television a reality. This article
describes the ATVEF enhanced television standard and the requirements
for designing ATVEF-compatible receivers.
Merely adding a protocol stack and networking API to your
software doesn't make you TCP/IP ready. You'll also need to assign your product a MAC address.
The first generation of network processors
is finally here. But what are they good for and how do they work?
Major semiconductor manufacturers are starting to sell a new
type of integrated circuit, the network processor. Network processors
are programmable chips like general purpose microprocessors, but
are optimized for the packet processing required in network devices.
Which is the most convenient end on your system? The
choices are big endian and little endian.
Some human languages are read and written from left to right;
others from right to left. A similar issue arises in the field
of computers, involving the representation of numbers.
The address resolution protocol provides a necessary
bridge between physical and logical addresses on a TCP/IP network.
Every system on a TCP/IP network has two addresses, one physical
and one logical. The address resolution protocol (ARP) provides
a necessary bridge between these two addresses.
